function getElementsByClass(searchClass,node,tag) {
	var classElements = new Array();
	if ( node == null )
		node = document;
	if ( tag == null )
		tag = '*';
	var els = node.getElementsByTagName(tag);
	var elsLen = els.length;
	var pattern = new RegExp("(^|\s)"+searchClass+"(\s|$)");
	for (i = 0, j = 0; i < elsLen; i++) {
		if ( pattern.test(els[i].className) ) {
			classElements[j] = els[i];
			j++;
		}
	}
    if (classElements.length != 0 ) {
        return classElements;
    } else { return false; }
}
function replaceIt(str1,str2) {
    str2 = str2.replace(/</g,"&lt;");
    str2 = str2.replace(/>/g,"&gt;");
    function rp() {
        var obj;
        function change() {
            if (str1 == "提交") {
                obj[0].value = obj[0].value.replace(str1,str2);
                obj[0].style.width = "auto";
            } else {
                for ( var i=0; i<obj.length; i++) {
                    var pattern = new RegExp(str1,"g");
                    obj[i].innerHTML = obj[i].innerHTML.replace(pattern,str2);
                    }
            }
        }
        switch ( str1 ) {
            case "阅读全文": if( obj = getElementsByClass("readmore",document,"a") ) { change(); };
            break;
            case "分享": if( obj = getElementsByClass("dig",document,"a") ) { change(); };
            break;
            case "随机文章：": if( obj = getElementsByClass("relpost",document,"div") ) { change(); };
            break;
            case "收藏到": if( obj = getElementsByClass("addfav",document,"div") ) { change(); };
            break;
            case "第一页": if( obj = getElementsByClass("pageNavi",document,"div") ) { change(); };
            break;
            case "上一": if( obj = getElementsByClass("pageNavi",document,"div") ) { change(); };
            break;
            case "下一页": if( obj = getElementsByClass("pageNavi",document,"div") ) { change(); };
            break;
            case "共": if( obj = getElementsByClass("pageNavi",document,"div") ) { change(); };
            break;
            case "页": if( obj = getElementsByClass("pageNavi",document,"div") ) { change(); };
            break;
            case "最后一": if( obj = getElementsByClass("pageNavi",document,"div") ) { change(); };
            break;
            case "发表于": if( obj = getElementsByClass("menubar",document.getElementById("comments"),"div") ) { change(); };
            break; 
            case "评论": if( obj = document.getElementById("comments") ) { obj = obj.getElementsByTagName("h2"); change(); };
            break;
            case "回复": if( obj = getElementsByClass("reply",document,"span") ) { change(); };
            break;
            case "发表评论": if( obj = document.getElementById("commentForm") ) { obj = obj.getElementsByTagName("h2");change(); };
            break; 
            case "姓　名": if( obj = document.getElementById("commentForm") ) { obj = obj.getElementsByTagName("label");change(); };
            break;
            case "地　址": if( obj = document.getElementById("commentForm") ) { obj = obj.getElementsByTagName("label");change(); };
            break;
            case "E-Mail": if( obj = document.getElementById("commentForm") ) { obj = obj.getElementsByTagName("label");change(); };
            break;
            case "提交": if( obj = getElementsByClass("button",document.getElementById("commentForm"),"input") ) { change(); };
            break;
            case "记住我": if( obj = getElementsByClass("rememberBox",document.getElementById("commentForm"),"span") ) { change(); };
            break;    
            case "您将收到博主的回复邮件": if( obj = getElementsByClass("emailnotice",document.getElementById("commentForm"),"span") ) { change(); };
            break;          
            default: alert("对不起，您输入的词语暂时不能帮您替换");
        }

    }
    if(document.addEventListener){
    window.addEventListener('load',rp,false);
    }else{
    window.attachEvent('onload',rp);
    }
}